Pulverizing-mac mine



(No Model.)

7 2 Sheets-Sheet 1. P. W. 'KRAUSE. PULVERIZING MACHINE.

No. 268,029. Patented Nov. 28', 1882.

jnveniot N4 PETERS. Pholv-lilmgmpfwr. Washington. 04 t;

(N0 l lodel.) 2 Sheets-Sheetfl.

, F. W. KRAUSE.

PULVERIZING MACHINE. No. 268,029. Patented Nov. 28, 1882.

N. PETERS Phnloulho m lmr, Wnslinglom D.C

UNITED STATES PATENT OFFICE.

FREDERICK w. KRAUSE, or CHICAGO, ILLINOIS.

PULVERlZING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 268,029, dated November 28, 1882,

, Application filed November 21, 1881. (N model.)

chines in which the quartz, rock, slag, or other material to be pulverized is subjected to the action of rapidly-revolving heaters within a cylindrical casin g.

The objects of my invention are to provide a more durable and effective lining for the easing of a pulverizing-machine; to protect that portion of the casing next to the feed-orifice, andwhere most exposed to wear; to provide a-revolving spider with beater-carrying arms ofsuch shape that without increase of mate riafthey shall offer the greatest resistance to wear; to so construct the heaters and'attach them to theircarrying-arms that the greatest durability maybe obtained; and, finally, to so construct the discharge orifice and spout'of the machine that the strength of the lining will be least impaired and the liability of the machine to clog when working upon wet or damp material will be avoided. These several objects of my invention I attain by the improved mechanism illustrated in the accompanying drawings, and hereinafter fully described and particularly claimed.

Figure 1 is a vertical section of the machine on line a b of Fig. 2. Fig. 2 is an endview of the same, showing the hopper and feeding mechanism in section. Fig. .3 is a side view of one of my improved heaters detached, and showing the portion of the same adapted to fit upon the revolving heater-carrying arms. Fig. 4 is .a view of the reverse side of such beater. Fig.5 is a sectional view of the beater,

taken upon the line cfof Figs. 4: and 5. Fig. 6 is a view of the feed-wheel detached. Fig. 7

' is aperspective view of two adjoining liningplates, showing the manner of forming the discharge-orifice therein. Fig.8 is alongitudinal cross-sectional view through the arms of the spider-wheel. Fig. 9 is a sectional view on line 20 got Fig. 8. Fig.10 is a sectional view on line m z of Fig. 8. I

Like letters of reference indicate like parts in the several views of thedrawin gs.

fastening device.

1 by set-screws 8 plates removable is to permit of the ready re- The cylindrical casingA, held upon suitable legs or standards, is constructed of two separable portions, connected by the hinges g at that part of the machine which, for convenience of description, I shall denoininate the back, and retained securely in position when the'machine is in operation through the me-' dium of the lugs to and abolt or other suitable Each of the halves of the casing A is composed of a semi-cylindrical plate and two flat semicircularend plates firmly joined together by the angle-irons a;

or, if desired, the attachment of these plates may be effected by providing either of thempreferably the end plates-with upturned .flan ges to receive the eonnectingrivets or bolts.

Within the casing A is placed the lining 0, formed of removable segmental plates, held in position by bolts of rivets T or by semicircular bands b bolted to the end plates of the easing in such manner as to form ways, in which the segmental plates are placed, the plates of the upper portion beingretained in their ways My object in making these placement by new ones of any such as may have become so worn as to be no longer fit for use. The face of these lining-plates is provided with intersecting ribs 0 0 forming pyramidal indentations 0 By constructing these curved lining-plates in this manner I obtain far greater strength than is possible where simple corrugated or serrated plates are employed, and this, too, without increasing the thickness of the plates, since it is obvious that the intersectin g vertical ribs, of curvilinear shape, will effectively avoid the possibility of any lateral breakage. It is to be noted, also, as of especial importancethat by means of the several inclined sides of theindentations the lumps of material will be much more efiectively pulverized by being caused to rebound violently against each. other and in all directions; and, moreover, the force of the blows and consequent strain on the lining will be greatly diminished by reason of the fact that the material does not strike the same squarely, but

I lumps having become partially pulverized.

Within the cylindrical casing, and upon a driving-shaft, i", journaled therein, is placed a revolving spider, B, having beater-carrying arms B in any desired number, preferably four. This spideris made ofcast-steel, wroughtiron, or other material of suitable strength for resisting the action of the substance being pulverized, and the arms are formed radially broad and tapering and axially narrow, giving them in cross-section an oval or ellipsoidal form, as

I at d, where subjected to greatest wear, and is provided upon one side with the flanges 0 and o, forming the recess 1, and upon the opposite side with the recess in. Into the recess l of the beater the end of the arm B is placed, and by the rivets or bolts d is fastened thereto.

It is to be noted that the flanges 0 0 serve the twofold purpose of clasping the arm, and thus relieving the bolts or rivets from strain,

' and otprotecti n g the ends of the arm and the heads of the bolts from being worn away, when in operation, by the action of the material. In order to better subserve this last object, the flange 0, which is in advance as the spider rotates, is made to project some distance beyond the arm B. The recess in similarly serves to protect the washers of the bolts or ends of the rivets from wear.

Upon theside of the casing A, and insubstantially the position shown in Fig. 1 of the drawings, is a feed-orifice, and the delivery-hopper F is connected to the machine at this point through the medium of the conduit Gr. Within this hopper F is placed the feed-wheel E, having compartments k, by means of which definite measures of the material to he pulverized are fed regularly to the machine. Q

To prevent the clogging of the feed, and consequent breakage of parts, the edges of the wheel E are rounded off, and for like reason the lower side of the hopper I is formed of a thin steel plate, 19, held by a suitable bearing Q5 in yoke s and rendered adjustable by the set- \screw 8 It will be seen that by thus making plate flexible and adjustable it will readily yield when any unusual strain fromlargelumps of material is offered, and will allow'such lumps to pass freely into the machine.

In the front of the cylindrical casing near the top, and in such location that the revolving spider-wheel shall beinterposed between the feedopening and the discharge orifice, there is formed a discharge-orifice of oval shape, which is fitted with a spout or nozzle, z',the outer portion of whichjis enlarged, and is provided with an inclined bottom, so that when the material operated upon is wet or damp it cannot rest upon the spout and cause the machine to clog, but by its gravity will fall. I

Through the lining O of the casing a discharge-opening is made of a shape corresponding with that in the casing, and I have found it advantageous to bevel the edges of the lining around the opening, so that no wet material can lodge thereon. It will thus be seen that by forming the discharge-orifice of the lining and easing of oval or ellipsoidal shape, and by locating the same remote from the feed-orifice, and by providing it with double-inclined surfaces, the material delivered to the machine becomes thoroughly pulverized and is freely discharged. Such I have found by long practice is not the case in machines having the discharge-orifice extending axially across the same, as the material is liable to be thrown out before thoroughly comminuted; nor is it the case in machines having smaller discharge-orifices without the inclined spout. The discharge-opening through the lining I prefer to form, as shown in Fig. 7, by cutting away a portion of two adjoining segmental plates, as by so doing less dangeris incurred ot'weakeningthe plates than when the entire opening is made in a single plate.

I have shown and described above but one revolving spider, although several of them may, if desired, be employed, being placed side by side upon the shaft, with their heaters in spiral relation.

The operation of my machine is as follows: Power being applied in any ordinary manner to the shafts of the feed-wheel and of the spider, the material to be pulverized is placed in the hopper, and by the action of thefeed-wheel is carried regularly and in definite charges through the delivery-spout into the machine, where it encounters the rapidly revolving heaters and is thrown violently against the lining, being thereby finely pulverized, and in the end passing out through the disch arge orifice and spout.

What I claim as new, and desire to secure by Letters Patent, is-

1. Acurved lining plate or surface for retary pulverizing-machines, having intersecting ribs which form pyramidal indentations, substantial] y as described.

2. A lining for the cylindrical casing of arotary pulverizingmachine, formed of curved segmental plates having diagonal intersecting ribs, substantially as described.

3. A lining or grinding plate for pulvering-- IIO sesame 3 machines, formed of separable plates, said liningbeing provided .with discharge orifice, a portion of which is cut in each of two adjoining plates, substantially as described.

4. Alinin g or grinding plate for, pnlverizingmachines, having .a beveled or inclined discharge-orifice. substantially as described.

5. The combination, with the cylindrical cas ing of a pulverizing-machine, of a protectingplate having a broad upper portion, provided with an opening corresponding substantially with the delivery orifice of the casing, and having the curved lower portion of decreasing breadth, substantially as described.

6. A spider for a pnlverizing-machine, having tapering radially broad and axially narrow beater-carrying arms, substantially as described. I

7. Ina pnlverizing-machine, the combination, with the. driving-shaft, of oval or ellipsoidal beater-carrying arms, substantially as described.

8. The beater of a pulverizi-ng-machine, havingupou its side theprojectingflanges to form a recess 0r seat for the beater-carrying arms, substantially as described.

9., A beater for pulverizing-machines, having an enlarged end and recessed sides, substantially as described. w

10. A. beater for pulverizing-machines, having in one piece with the body .of the beater the enlarged portion or head 01, adapted to fit over the end of the carrying arm, and a side flange, 0, adapted tolfit over and protect the forward edge of said arm, substantially as described.

11. The combination, with the casing of a pulverizing-machine', having a discharge-orifice located with respect to the revolving beater and the feed-opening, substantially as 4 described, of an obliquely-inclined dischargenozzle, substantially as set forth.

FREDERICK W. KRAUSE. Witnesses:

CHARLES STEWART, .WILLIAM FIELD'ING. 

